John s



1110 Sofnanom'tngrane;

PATENTE@ DEC 31 '1867 liHlHl @atten taft 'a-@aient @ffice JOHN IS. COFFMN, O F .GREEN'YILLR INDIANA. Lam man; No. 72,801, dated ,December 31,1867.

IMPROVBDDROTARY CRANE.

TO ALL WHOM ITMAY CONCERN:

Be it known that I, JOHNS. COFFMAN, of Greenville, iul the county of'Floyd,.and State of Indiana, have invented a new and improved Rotating Crane; and I do hereby declare that the following is a full, clear, and

exact description thereof, which will enable others skilled in the art to make and use the same, reference being.

had to the accompanying drawings, forming-part of this specification. A

This inventiourelates to a new and improved method of constructing cranes orv derricks, whereby the same arc more easily manipulated, and more simply and economically constructed.

. It'eonsists of a frame or stand, ou the top of which are a revolving windlass and 'windlass-frame, around the axle of which windlass is the'cord or rpc by means of which merchandise is raised.

The drawing represents a front view of the stand, wind'lass, and frame.

A is the stand; B is the windlass-frame; C is the axle ofthe windlass, having upon it a screw-thread; D is a nut, throughwhich the axle C passes, moving on the frame B in the guide e; F is the cord or rope, by means of which goods are raised; G is a hook on the end of rope F, by which merchandise is attached to rope F; a are pivots, upon which frame B rotates; W is the wheel -by which the axle C is turned by means of the .endless cord or rope H. 'A The stand A consists of a tripod, of sutlicient Aheight for the purposes wanted, upon ytlie top of which is pivoted the windlass-frame B bythe pivots a. In the frame B, upon bearings, as shown in the. drawings, turns the axle C, to one'end of-which the grcoved wheel 'or pulley W. Upon lsaid axlo C is a screw-thread, which fits into 'thcnut D. The nut D is so constructed asto slide upon 'thc fratrie B, by means -of an arm attached to the said nut D. AkIn 'the ond of thearm of snidnutis a'hole, and corresponding with said hole there is, in the frame fa slot through which passes the cord or rope F, and by means of which said hole the rop'e F is so guided :1s-not to vbe wound upon itself, upon the axle C, but be laid evenly and smoothly upon said axle C. The rope Fis attached by one cud to the axle C, and to the other cnd of the same is att-ached the hook G. An endless rope or cord, K, passes over the wheel or pulley w, in the groove in the same, by means of which the wheel W and axle C are made to turn in either direction, and the rope Flwound upon thc axle C, or unwound from'thc' same. The frame B. rotates, upon the stand A, so that thev end of the axle C, which is attached the hoisting-rope F, will describe a circle around thc centre a.

The operation is suchthat by turning the axle C, the nut D is moved along on the frame Il, and said nut D having a' holcthrough the arm attached to the same, through which the ropezF passed the saine, is guided along the axle C, and wound evenly upon the same.

Said crane or dcrrick may be made oi' wood,'or wood and metal combincd, and, ns above described, constitutosa cheap, durable, and reliable elevating or hoisting-apparatus, and one which is easily manipulated.

I claim as new, and desire to secure by Letters Patent* I 1. 'lhe axle C, having on it acscrew-thread and the nut D, as a guide forthe rope F, substantially as shown and described, and for the purposes set forth. v

2. The rotating windlass-framc B, in combination with the wheel W, axle C, nut D, and stand A, substantiallyas shown and described, and for the purposes set forth. v

' JOHNS. COFFMAN.

Witnesses GEORGE COFFMAN, JAMES TAYLOR. 

